Air-brake.



PATENTED JULY 31,1906. WH. COLLINS.

AIR BRAKE. `AIPPYLIGATION FIL'ED APR-9. 1906.

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A STATES PATENT OFFICE.'

WILLIAM H. OOLLINS, or TUCSON; ARIZONA fininnroinrfV4 ASSIGNOR or .ONE-:HALF To HENRY JOHN SMALL, or SAN ERANOISOGCALIFORNIA.

,` i Specification of Letters Patent. l Patented July- 31,A',l906. n

Appliuationnea April 9, 1906. serial N0. 810.504.

To all whom it #may concern: Beit known that I, WILLIAM H. COLLINS, a citizen of the United States, residing in Tucson, Pima county, yTerritory-of Arizona, ha ve invented certain new 'and useful Improvements'in Air-Brakes; and I do hereby declareE `the following to be a full,'clear, and exact desciption of the' same.

' linea: of Fig. 3..

y'invention relates te the class of air-k brakes, and has for its object theincreasing ofthe 'brake-cylinder pressure in an'emergency application of the-brake.

f My invention consists, in connection with the auxiliary reservoir' and quick-action triple valve of the brake system, of an addi-4 tional auxiliary reservoir and an emergencyvalve controlling the same, as I shall hereinafter fully describe by reference to the accompanying drawings, in Which- Figure l is a diagrammatic view showing the general relation of parts. Fig. 2 is a sectional view of the quick-actiontriplevalve, showing the ap lication thereto of my emergency-valve. tion, enlarged, of said emergency-valve. Fig. 4 is a cross-section of the-same on the Referring to Fig. 1, Ais the auxiliary reservoir, from which a vpipe'B leadsto the quickaction triple valve C, which is bolted to the brake-cylinder D. .The particular triple valve to which my invention is best applicable .is that knownas the New York quickaction tri le valve', and, as shown irl-Fig. 2, it is herein Illustrated in connectiongwith-such valve. Referring now to Fig. 2, it will be suiIicient, as far as the ordinary operation of this valve is concerned, to say that pressure applied through port H operates the piston P,

. ond auxiliary reservoir (designated in Fig. 1 by E) and an remergency`valve, which as a' the rod p of .which Opens Athel quick-action valve and allows the emergency-pressure from the auxiliary reservoir A to bea plied through port K, 'through the Open va ve' Q and port L to the brake-cylinder. To increase this emergency-pressure, I adda sec- Whole is designated by F. The locationoI` valve Fis seen in Fig. 2, wherein it is shown screwed into the triple-valve veasing in the o ening which is usually occupied by the cap the quick-action valve Q. v

The enlarged section, Fig. 3, shows 'the l construction ofthe emergency-valve F. It

. between the pipe it and t'hepcrts f4, made,

ig. 3 is a longitudinal'secconsists of an outer shell f, externally thread-i' v55 ed at one endto adapt it .for connection with* the triple-valve casing, as 'Shown in Fig. 2. T he shell is internally threaded at the other end to receive the cap G, which-in-practice may be the samecap which inthe ordinary 16o system' coversthe quick-action. valve .Q and' "which `is removed I garder Vto connect 'the *valve F. 4Said shell 1s ,also provided with a-A couplin'g-iiange to4 f connect the pi e h, which leads to t e additional or.' secon aux- 65 iliary 'reservoir E. 1 The interior of the` shell f is 4provided with a seat atfz, uponwhich is a. va ve f3, which controls -thecommun'i'.cation preferably, in annular series', .as seen in Fig. e, in the inner end of shell f, which erts bestI open out sidewise, behind a shie d @,into the port `K of the :triple-valve casing. -A

' spring fholds the valve f 3 to its seat, andthe stemf. of said valve passes inwardly to and contacts with the stem g of the quick-action valve Q, as seen in FigZ. i The operation is as follows: On charging up the brake system air will flow from the auxiliary reservoir A through port K of the tri le valve C, on top of the quicli-actionv va ve Q, and thence through ports f4 under the valve f 3, .raising said valve from its seat f2 against springf, and will thenpass through pipeh .to `the additional or second reservoir E, charging it with the same pressure as bothy train-line and reservoir A. When the pressure in the additional reservoir E has become equalized with the train-line pressure, the valve f3 willbe closed by the spring f5 under the cap G and on topro said valve. Upon making an emergenc application of the brake the' valve f 3 will e raised from the seat f2 by the contact of the stern of the quickaction' valve Q with the sterne of said valve 95 f3, thus allowingY the air in the additionalseservoir E to discharge past said valve f3 and to ilow through the portsf4 into the port K and thence through the' open quick-action valve Q to the brake-cylinderD, which air, itV will thus be seen, is in addition'to the air vented intothe brake-cylinder from thereservoir A. -By this arrangement there is double the amount of reservoir volume of ain vented into the brake-cylinder in an emer-` gency application than where the single auxiliary lreservoir is used, resulting in an increased pressure in the brake-cylinder.

29 aum'liary, reservoir the discharge from which to the brake-cylinder is controlled by said ond emergency-valve.

'In an air-brake, and in combination .with the brake-cylinder; the auxiliar reser- Ai5' 'voir and an emergency-valve control 'ng the charge from said reservoir to the brakecylinder, a second emergency-valve operated .bythe first emergency-valve .and disposed relatively'to said iii/ist valve to discharge zo through it to the brake-cylinder and a second auxiliaryreservoir the discharge from which tothe brake-cylinder is controlled by said 4'second emergency-valve.

3.- In an airbrake, the combination of a a5 brake-cylinder, an auxiliary reservoir, an emergency-valve controlling the4 discharge i from said reservoir to the brake-cylinder, a

second emergency-valve fitted in relation to the first emergency-valve to eect, by the contact of their stems, the operation of the second by the first, and a second auxiliary' reservoir, the discharge from which tothe brake-cylinder is controlled by said second einer ency-valve.

4, n an air-brake, the combination of a brake-cylinder, an auxiliary reservoir, a tri le valve having an emergency-valve contro ling the discharge from lthe auxiliary reslervoir vto they brake-cylinder, a second emergently-valve the shell of which is iitted to thel casing of the triple valvefso that said emergency-valves have their .stems alined to con# tact,l whereby they work in unison, and discharge, the second through the first, and a second' auxiliary reservoir, thel discharge from which to the brake-cylinder is controlled by said second emergency-valve;

In Witness' whereof` I have hereunto set my hand.

WILLIAM II. COLLINS.

Witnesses:

lEDWARD M. DicKERMAN, M. R. MILLER. 

